cgamla Posted March 22, 2006 Report Share Posted March 22, 2006 How about the pistons are in backwards. Quote Link to comment Share on other sites More sharing options...
tijoe696 Posted March 22, 2006 Author Report Share Posted March 22, 2006 (edited) My head is ok ! When I saw this, I changed my cool head for my stock head. I have 110 psi with my cool head and 75 psi with my stock head. I think ...My compression tester is ok. I tested my snowmobile with ! 140 psi .. OK My engine run like shit .. I have a ping noise comming from the cylinder with both head. And I don't know why, I have the same jetting and it running lean. It's the first time its happen to me. The arrows are in the good way !! Sorry for my english ... I speek french. I live to quebec city in Canada. Thank you a lot guys Edited March 22, 2006 by tijoe696 Quote Link to comment Share on other sites More sharing options...
dajogejr Posted March 22, 2006 Report Share Posted March 22, 2006 True dat... The arrows don't lie... Quote Link to comment Share on other sites More sharing options...
dajogejr Posted March 22, 2006 Report Share Posted March 22, 2006 Sounds like two things. Fresh bore and pistons time. Take the new pistons (next size up) to your engine shop who is actually going to do the bore, so they can match them. Then...once back together, work on the jetting... There are tonz of threads on here, in the jetting and exhaust forum, to help get your jetting close...you'll have to dial it in from there... Quote Link to comment Share on other sites More sharing options...
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